PEORIA, Ill. -- Peoria public works crews are working around the clock to clear streets but officials say residents need to be patient.
As temperatures drop throughout the evening, the salt used by crews will become ineffective and the roads will remain icy.
There are 25 crews on duty during each shift.
Crews began clearing residential areas around noon today.
Officials said some of the roads that have been plowed may not look like it because of the drifting snow.
Once crews have cleared neighborhoods, they will go back to clearing primary roads.
But officials say it will take time.
"It could take up to 7 days to actually do the full cleaning," said Mike Rogers, the Peoria Public Works Director. "When I'm talking about the cleaning and clearing I'm talking about the local roads and the primary roads. We will be active, we have 24 hour operations which will continue until we do see a clearing here within the city.",
There is a parking ban in affect for Peoria, East Peoria and Pekin.
Those violating the parking ban and parking on the street could face a $250 fine.
Officials also advise residents to wait to shovel their driveways until after the plows have moved through their neighborhoods.
Despite bad roads, Illinois State police said traffic continues to increase on the interstates.
But just because part of the road may look clear -- officials warn you never know what's ahead.
One state trooper says drivers speed up thinking roads are safe when they hit a slick spot and go off the road.
"Most of the things we've been handling today are people sliding off the road," said Illinois State Trooper Dustin Pierce. "Thankfully we haven't had any significant crashes or crashes with injuries yet. But if people keep out here in this, it's only a matter of time.
If you do get in an accident, make sure you know where you are so emergency responders can find you.